Hashirama kicks the opponent away and raises some wood tendrils to strike the enemy down. With the opponent layed on the ground, Hashirama gathers a large amount of chakra into his right fist, jumps and drives it into his foe's torso. The impact causes the ground to break apart and a small forest to erupt from it.
Vajra is a mythical substance that can cut any substance, but cannot be cut itself.
Acala, known as Fudō Myōō (不動明王, Literally meaning: Immovable Wisdom King) in Japanese, is one of the Five Wisdom Kings in Buddhism. Acala is the destroyer of delusion and a principal protector of Buddhism. His immovability refers to that aspect of mind which is forever unmoved: perfectly stable and unchanging.